JP3456591B2 - Precision adjustment device - Google Patents

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Industrial applications Conventional technology (Figs. 5 and 6) Problems to be Solved by the Invention (FIGS. 1 and 7 to 9) Means for Solving the Problems (FIGS. 1 to 4) Action (Figs. 1-4) Example (FIGS. 1 to 4) The invention's effect

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precision adjusting device, which is suitable for application to, for example, an optical path adjusting device for adjusting an optical path length of a laser light of an optical pickup for a compact disc (hereinafter, simply referred to as an optical path length). Is.

[0003]

2. Description of the Related Art Conventionally, as shown in FIG. 5, in an optical pickup 1 of this type, a laser beam emitted from a laser diode 2 is used as an optical component 3 for adjusting an optical path length (hereinafter referred to as an optical component for adjusting an optical path length). 3) and irradiate the surface of the compact disk through an objective lens (not shown), and the return light at this time is returned to the objective lens and the optical component for adjusting the optical path length. Information is recorded on the compact disc based on an electric signal output from the photo detector 5 (hereinafter referred to as a data detection signal). There is.

In this case, the optical path length adjusting optical component 3 is shown in FIG.
As shown in FIG. 6, a groove 6A formed on one side surface of the head housing 6 along the optical path of the laser light is provided so as to face the laser diode 2 and to hold the optical component pressing cover 7
Is held so as to be pressed against the bottom surface of the groove 6A. Further, a U-shaped groove 3A (hereinafter, referred to as U-shaped groove 3A) is formed on a side surface of the optical path length adjusting optical component 3 which is in contact with the bottom surface of the groove 6A so as to be perpendicular to the groove 6A of the head housing 6.
Is formed, and a circular window hole 6B is formed on the bottom surface of the groove 6A of the head housing 6 that comes into contact with the optical component 3 for adjusting the optical path length. Are designed to fit together.

The adjusting jig 8 is shown in FIGS.
As shown in (A) and FIG. 8 (B), the tip portion 8A is formed to be one size smaller than the diameter of the other portions so that the outer diameter of the window hole 6B of the head housing 6 is the same. On the tip surface of the tip portion 8A, the U-shaped groove 3 of the optical component 3 for adjusting the optical path has an outer diameter at a position displaced from the central axis K1 by a predetermined amount r.
A cylindrical protrusion 8B having the same groove width as that of A is formed.

Therefore, in the optical pickup 1, the protrusion 8B of the adjusting jig 8 is the U-shaped groove 3 of the optical component 3 for adjusting the optical path length.
As shown in FIG. 9, the optical path length adjusting optical component 3 is rotated about the central axis K1 after the tip portion 8B is fitted into the window hole 6B of the head housing 6 so as to fit into A. The optical path length adjusting optical component 3 is attached to the groove 6 of the head housing 6 in correspondence with the rotation angle θ of the adjusting jig 8.
It can be slid vertically along A so as to draw a sine curve, whereby the optical path length can be adjusted.

[0007]

By the way, in this kind of adjustment work (hereinafter referred to as optical path length adjustment work),
As shown in FIG. 5, the symmetrical optical pick-up 1 to be adjusted is fixed to the compact disc 11 for evaluation by attaching it to the reference shaft members 10A and 10B, and in this state, the evaluation is performed. The operator holds the adjusting jig 8 on the basis of the data detection signal output from the photo detector 5 while rotating and moving the compact disk 11 for the optical pickup 1 at a constant linear velocity. .

In this case, the work of adjusting the optical path length is finally 1
Sufficient concentration is required to make fine adjustments in [μm] units. However, since the optical path length adjustment work is a delicate adjustment work as described above, there is a problem in that the reliability and continuity cannot be maintained by the manual adjustment work, and the adjustment amount varies among workers.

Therefore, as one method for solving this problem, conventionally, it has been considered to perform the optical path length adjustment work of the optical pickup 1 using a machine. However, in the adjustment work using a machine, if the adjustment jig 8 is fixed in a positioned state, an unnecessary force is applied to the head housing 6 via the adjustment jig 8 to cause distortion, which makes adjustment impossible. Alternatively, the distortion may be restored after the optical path length adjustment and the position of the optical component 3 for adjusting the optical path may be displaced, resulting in a poor adjustment.

On the other hand, when the adjusting jig 8 is made flexible so as not to apply an unnecessary force to the head housing 6, the adjusting jig 8 is inserted into the window hole 6B of the head housing 6. There is a problem that positioning is difficult.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose a precision adjusting apparatus capable of surely performing a delicate adjusting operation with high accuracy.

In order to solve such a problem, in the present invention, a rod-shaped bit 36 having an action portion 36A formed at the tip thereof.
In the precision adjusting device having the rotating means 34 for rotating the bit 36 around the central axis K1, the bit 36 is sandwiched so as to be supported from at least three different directions, and the sandwiching is released if necessary. Bit fixing means 40, and the output shaft 3 of the bit 36 and the rotating means 34
4A is provided so as to pivotally connect 4A and a connecting means 35 made of a flexible member that allows the angles formed by the connecting axes to be freely formed. The bit fixing means 40 is provided with a bit 3 at one end in the longitudinal direction with a fulcrum interposed therebetween.
6, a plurality of bit supporting means 41A are provided with positioning claws 41AX to 41CX which are in contact with 6 and pulleys 43A to 43C pivotally supported in the direction orthogonal to the longitudinal direction of the bit 36 at the other end. .About.41C and a plurality of bit supporting means for covering the bit 36 slidably in the longitudinal direction of the bit 36 and tapering the portions of the plurality of bit supporting means 41A to 41C that come into contact with the pulleys 43A to 43C. The opening / closing means 38 of 41A to 41C and the driving means 39 of the opening / closing means 38 for sliding the opening / closing means 38 in the longitudinal direction of the bit 36 are provided.

Further, in the present invention, the optical pickup 1
In the precision adjusting apparatus for adjusting the optical path length of the optical pickup 1, a rod-shaped bit 36 having a projection 36A formed at the tip for engaging with the groove 3A of the optical path length adjusting optical component 3 of the optical pickup 1 and the center of the bit 36 are provided. The motor 34 that rotates around the axis K1 is interposed between the bit 36 and the output shaft 34A of the motor 34, and the central axis K1 of the bit 36 and the output shaft 34A.
And a positioning member 41AX-41CX that abuts the bit 36 is formed at one end in the longitudinal direction across the fulcrum, and the other end is in a direction orthogonal to the bit 36. A pulley 43 that is pivotally supported.
The first, second and third rod-shaped supporting means 41A to 41C provided with A to 43C and the bit 36 are slidably covered in the longitudinal direction of the bit 36, and the first, second and third rod supporting means 41A to 41C are provided. The opening / closing member 38 of the first, second and third rod-shaped supporting means 41A-41C and the opening / closing member 38 are formed in a bit 36. And an air cylinder 39 that slides in the longitudinal direction.

[0014]

The bit 36 is pivotally connected to the output shaft 34A of the rotating means 34 through the connecting means 35 made of a flexible member, and the bit 36 is sandwiched so as to be supported from at least three different directions, and Since the pinch is released as needed, the bit 36 can be positioned and fixed as needed, and the bit 36 can also be provided as needed.
Can be flexible.

The output shaft 3 of the bit 36 and the motor 34
4A and a positioning member 41AX that abuts on the bit 36 at one end in the longitudinal direction across the fulcrum.
.About.41CX are formed and pulleys 43A to 43C rotatably supported in the direction orthogonal to the bit 36 are provided at the other ends of the first, second and third rod-shaped supporting means 41A to 4C.
1C and the bit 36 are slidably covered in the longitudinal direction of the bit 36, and the first, second and third rod-shaped supporting means 41A are provided.
To 41C, the first, second, and third rod-shaped supporting means 4 having tapered portions in contact with the pulleys 43A to 43C.
By providing the opening / closing member 38 of 1A to 41C and the air cylinder 39 that slides the opening / closing member 38 in the longitudinal direction of the bit 36, the bit 36 can be positioned and fixed as necessary, and at the same time, as necessary. Bit 36
Can be flexible.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 2 in which parts corresponding to those in FIGS. 4 to 7 are designated by the same reference numerals, 20 indicates a precision adjusting device as a whole, which adjusts the optical path length with respect to the optical pickup 1. Has been done. That is, in the precision adjustment device 20, the evaluation base 2 is attached to one end of the plate-shaped base member 21.
2 is provided on the upper surface of the evaluation base 22 so that the window hole 6A (FIG. 6) of the head housing 6 of the optical pickup 1 to be adjusted faces the other end of the base member 21. , 23B and reference shaft members 10A, 10B
It is designed to be attached via.

Inside the evaluation base 22, there is disposed a slide base 24 which is slidable in the upward direction indicated by the arrow a or in the downward direction opposed thereto, and the upper surface of the slide base 24 is provided. The spindle motor 25 is mounted, and the evaluation compact disk 11 is attached to the rotary shaft 25A of the pindle motor 25 via a turntable 26. In this case, in the spindle motor 25, the evaluation compact disc 11 is rotated so that the linear velocity is constant with respect to the optical pickup 1 while adjusting the angular velocity according to the slide amount of the slide base 24. The optical pickup 1 can detect information recorded on the evaluation compact disk 11 through the opening 22A of the evaluation base 22.

In the optical pickup 1, a controller (not shown) arranged outside the device 20 (hereinafter referred to as an external controller) is electrically connected via a control cable 27 to transmit a data detection signal. The data is output to the external controller via the control cable 27. On the other hand, a plate-shaped slide base 30 is arranged in the center of the base member 21, and a plate-shaped adjustment unit moving slider 31 is mounted on the slide base 30.

The adjusting unit moving slider 31 is connected to an output shaft 32A of an air cylinder 32 arranged at the other end of the base member 21, and a slide base is moved by a force given through the output shaft 32A. The table 30 is configured to be freely slidable in a front direction indicated by an arrow b or in a rear direction opposite to the front direction. For this reason, a stopper 33 is provided at a predetermined position between the evaluation base 22 and the slide base 30 of the base member 21 to regulate the forward distance of the adjustment unit moving slider 31.

A motor 34 for adjusting optical parts is arranged on the rear end side of the upper surface of the slider 31 for moving the adjusting unit, and the output shaft 34A of the motor 34 is made of a flexible material formed in a columnar shape. A rod-shaped adjustment bit 36 is attached via a member 35. In this case, in the motor 34, the control signal output from the external controller based on the data detection signal is sequentially input, and the output shaft 34A is rotated based on the control signal, whereby the adjustment bit 36 is moved to its central axis. It is designed so that it can be rotated about the required amount.

The tip 36A of the adjusting bit 36 has a small diameter similarly to the tip of the adjusting jig 8 (FIGS. 6 and 7), and a circular vertebra-shaped projection 36B is formed on the tip surface.
The tip end portion 36A and the compliance member 35 are supported by an adjustment bit support portion 40 including a lever holder 37, a lever pusher 38, and an air cylinder 39 arranged on the front end side of the adjustment unit moving slider 31. In the adjustment bit support portion 40, three centering lever members 41A, 41 arranged at the front end of the lever holder 37 when the adjustment unit moving slider 31 moves forward.
The adjustment bit 36 is sandwiched by B and 41C, so that the tip end 36A of the adjustment bit 36 is surely fitted into the window hole 6B of the optical pick-up 1 as the adjustment unit moving slider 31 advances. Thus, the adjustment bit 36 is positioned and fixed.

Further, in the adjustment bit support portion 40, when the tip end portion 36A of the adjustment bit 36 is fitted into the window hole 6B of the optical pickup 1, the centering lever members 41A to 41A are provided.
The holding of the adjustment bit 36 by C is released, and thereby the adjustment bit 36 is supported in a rotatable state.

In the case of this embodiment, in the first to third centering lever members 41A to 41C, as shown in FIG. 3, the upper portion 37A of the lever holder 37 formed in a cylindrical shape.
At the tip end of the output shaft 34A of the motor 34 at an equal angle radially with respect to a reference line K2 that is an extension of the center line
Further, the central portions thereof are attached so as to be axially supported by the shaft members 42A, 42B, 42C.
Further, in each of the centering lever members 41A to 41C, the front end portion is slightly bent toward the reference line K direction to form contact portions 41AX, 41BX, 41CX, and the rear end portion has rollers 43A, 41A. 43B and 43C are attached so as to be pivotally supported so as to be freely rotatable in the direction of the reference line K2.

In the lever pusher 38, a cylindrical lever pusher portion 38B is formed on the upper end of one surface of the plate-shaped flat plate portion 38A, and an output shaft 39A of the air cylinder 39 is connected to the lower end of the other surface of the flat plate portion 38A. Is
As a result, the lever pusher portion 38B can be smoothly slid in the through hole 37AX of the lever holder 37 by the force given through the output shaft 39A. In this case, in the lever pusher 38, the tip of the lever pusher portion 38B is formed in a taper shape, and by pushing the lever pusher portion 38B into the through hole 37AX of the lever holder 37, the centering lever members 41A to 41C are respectively pushed. It is designed to be rotatable around the shaft member.

Therefore, in the adjustment bit support portion 40, the lever pusher portion 38A of the lever pusher 38 is strongly pushed into the through hole 37AX of the lever holder 37, so that the contact portions 41AX to 41C of the centering lever members 41A to 41C.
41CX can be strongly brought into contact with the adjustment bit 36 positioned so as to pass through the through hole 38AX of the lever pusher 38 and the through hole 37AX of the lever holder 37, respectively, whereby the adjustment bit 36 is aligned with the first to third centers. The lever members 41A to 41C are positioned and fixed so as to be sandwiched.

[0027]

In the case of this embodiment, the compliance member 35 includes the output shaft 34A of the motor 34 and the adjusting bit 3.
The central axes of 6 are not offset as shown in FIG. 4A, but the output axes 34A and 34A of the motor 34 are set so that the angles formed by the central axes are freely set as shown in FIG. 4B. The adjusting bit 36 is adapted to be pivotally connected.

In the above configuration, the precision adjusting device 2
0, when adjusting the optical path length of the optical pickup 1 attached to the upper surface of the evaluation base 21, the air cylinder 32 is used.
Applies a propulsive force to the adjusting unit moving slider 31 via the output shaft 32A to move the adjusting unit moving slider 31 forward, whereby the adjusting bit 36 is moved.
The tip portion 36A of the optical pickup 1 is fitted into the window hole 6B of the optical pickup 1.

Thereafter, in the precision adjusting device 20, the motor 34
Adjusts the optical path length of the optical pickup 1 by sequentially rotating the adjustment bit 36 by a required amount based on the control signal supplied from the external controller. In this case, in the adjustment bit support portion 40, when the tip end portion 36A of the adjustment bit 36 is fitted into the window hole 6B of the optical pick-up 1, the first to third centering lever members 41A to 41C are moved by the adjustment bit 36.
The adjustment bit 36 is positioned and fixed by sandwiching.

On the other hand, in the adjustment bit support portion 40, after the tip end 36A of the adjustment bit 36 is fitted into the window hole 6B of the optical pickup 1, the first to third centering lever members 4 are provided.
1A to 41C are opened to release the positioning and fixing of the adjustment bit 36, so that the compliance member 35 absorbs an unnecessary force applied to the head housing 6 of the optical pickup 1 via the adjustment bit 36 to cause the head housing 6 to move. The external force that acts is suppressed as much as possible. Therefore, in the precision adjusting device 20, if necessary, the adjusting bit 3
Since the adjustment bit 36 can be fixedly held and the adjustment bit 36 can be made flexible if necessary, the distortion of the head housing 6 can be efficiently prevented when the optical path length of the optical pickup 1 is adjusted.

According to the above construction, the adjustment bit 36 is attached to the rotary shaft 34A of the motor 34 via the compliance member 35 formed of a flexible base material, and the adjustment bit support portion 40 is provided to adjust as necessary. Bit 36
The adjustment bit 36 is fixedly supported by sandwiching the adjustment bit support portion 40 with the first to third centering lever members 41A to 41C and, if necessary, the first to third centering lever members. Since the holding by 41A to 41C is released, the external force applied to the head housing 6 of the optical pickup 1 via the adjustment bit 36 can be suppressed as much as possible, and thus the optical path length of the optical pickup 1 can be reliably and accurately. You can make adjustments.

In the above embodiment, the case where the present invention is applied to the precision adjusting device 20 for adjusting the optical path length of the optical pickup 1 has been described, but the present invention is not limited to this, and other precision is possible. It is suitable to be applied to various precision adjusting devices that perform various adjustments.

Further, in the above-mentioned embodiment, the description has been made regarding the case where the three centering lever members 41A to 41C are arranged at the tip of the lever holder 37 radially at equal intervals around the central axis K2. However, the present invention is not limited to this, and the number of centering lever members 41A to 41C may be any other value, and the arrangement state may be any other state.

Further, in the above-described embodiment, the case where the adjustment bit 36 is positioned and fixed by sandwiching the adjustment bit 36 by the centering lever members 41A to 41C has been described. Is not limited to this,
In short, various other methods can be applied as the positioning and fixing means of the adjustment bit 36 as long as the positioning bit 36 can be positioned and fixed if necessary and the positioning fixation can be released as necessary.

Further, in the above-described embodiment, the case where the compliance member 35 is formed of a flexible base material has been described, but the present invention is not limited to this, and the point is that the center axis of the adjustment bit 36 and the motor 34 are essential. The output shaft 34A of the adjustment bit 36 and the motor 34 is set so that the angle between the center shaft of the adjustment bit 36 and the output shaft 34A of the motor 34 can be freely set without offsetting the center shaft of the output shaft 34A. Compliance member 35 if coupled
Various materials can be applied as the base material.

[0037]

As described above, according to the present invention, in the precision adjusting device having the rod-shaped bit having the action portion formed at the tip and the rotating means for rotating the bit around the central axis, at least the bit is provided. While sandwiching so as to be supported from three different directions, the bit fixing means capable of releasing the sandwiching if necessary and the output shafts of the bit and the rotating means are pivotally coupled and the angle formed between the coupling axes is determined. The bit fixing means is provided with a positioning claw which comes into contact with the bit at one longitudinal end across the fulcrum, and at the other end in a direction orthogonal to the longitudinal direction of the bit. A plurality of bit supporting means in which pulleys rotatably supported are arranged, and the bit is slidably covered in the longitudinal direction of the bit, and the portions of the plurality of bit supporting means that contact the pulleys are tapered. By forming the opening / closing means of the formed plurality of bit supporting means and the driving means of the opening / closing means for sliding the opening / closing means in the longitudinal direction of the bit, the bit can be positioned and fixed as necessary and necessary. Depending on the item, the bit can be made flexible,
Thus, it is possible to realize a precision adjustment device that can perform delicate adjustment work with high accuracy and reliability. Further, in a precision adjusting device for adjusting the optical path length of the optical pickup, a rod-shaped bit having a projection formed at the tip for engaging with the groove of the optical component for adjusting the optical path length of the optical pickup, and the bit around the central axis of the bit. A flexible member that is inserted between the rotating motor and the output shaft of the bit and the motor and that allows the angle between the center axis of the bit and the center axis of the output shaft to be freely formed, and a bit at one end in the longitudinal direction across the fulcrum. A bit, a positioning claw that abuts against, and a pulley on the other end that is rotatably supported in a direction orthogonal to the bit. Of the first, second and third rod-shaped supporting means, the portions which slidably cover the longitudinal direction of the bit and which contact the pulleys of the first, second and third rod-shaped supporting means are tapered. Open and close the open / close member and the open / close member in the longitudinal direction of the bit. By providing an air cylinder to move, the bit can be positioned and fixed as needed, and the bit can be made flexible as necessary, thus making it possible to perform fine adjustment work with high accuracy and reliability. It is possible to realize a precise adjusting device.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a precision adjusting device according to the present invention with a partial cross section.

FIG. 2 is a schematic top view showing the precision adjusting device of FIG.

FIG. 3 is a schematic cross-sectional view showing details of an adjustment bit support portion.

FIG. 4 is a side view for explaining another embodiment of the compliance member.

FIG. 5 is a schematic perspective view for explaining an optical pickup.

FIG. 6 is a schematic perspective view for explaining an optical component for adjusting an optical path length.

FIG. 7 is a schematic perspective view for explaining an optical component for adjusting an optical path length.

FIG. 8 is a side view for explaining an adjustment bit.

FIG. 9 is a characteristic curve diagram for explaining a lift amount of an optical component for adjusting an optical path length according to rotation of an adjustment bit.

[Explanation of symbols]

1 ... Optical pickup, 3 ... Optical component for adjusting optical path length,
6 ... Head housing, 6A ... groove, 6B ... window hole,
8 ... Adjusting jig, 11 ... Compact disc for evaluation, 20 ... Precision adjusting device, 22 ... Evaluation base, 37
...... Lever holder, 38 ...... Lever pusher, 38B ...
... Lever pusher part, 39 ... Air cylinder for lever pusher, 40 ... Adjustment bit support part, 41A to 41C
...... Centering lever member, 42A to 42C ...... Shaft member, 4
3A-43C ... Laura.

Claims (2)

(57) [Claims] 1. A rod-shaped bit and an operating portion formed at the tip thereof.
And a rotating means for rotating the bit around the central axis.
In the precision adjustment device Support the bit from at least three different directions
And hold it in this way, and release it if necessary.
Possible bit fixing means, When the bit and the output shaft of the rotating means are pivotally connected,
Together, the angle between the bond axes can be freely adjustedMade of flexible material
With coupling means, The bit fixing means is A position that contacts the bit at one end in the longitudinal direction across the fulcrum
Positioning claws are formed, and the other end is in the longitudinal direction of the bit.
A pulley is provided that is pivotally supported in a direction orthogonal to
A plurality of bit support means, Covering the bit slidably in the longitudinal direction of the bit,
Portions of the plurality of bit support means that contact the pulleys.
Of the plurality of bit support means formed in a tapered shape.
Closure means, Sliding the opening / closing means in the longitudinal direction of the bit
Drive means for opening and closing means Precise adjustment characterized by
Straightening device. 2. A precision adjusting device for adjusting the optical path length of an optical pick-up, wherein a rod-shaped bit having a projection formed at the tip for engaging with a groove of the optical path length adjusting optical component of the optical pick-up, and the bit A motor that rotates around the center axis of the bit, and a flexible member that is interposed between the bit and the output shaft of the motor and that allows the angle between the center axis of the bit and the center axes of the output shafts to freely change. Positioning claws that come into contact with the bit are formed at one end in the longitudinal direction across the fulcrum, and pulleys that are rotatably supported in the direction orthogonal to the bit are provided at the other end. 2 and a third rod-shaped support means, and covers the bit slidably in the longitudinal direction of the bit,
It said first, second and the first of the above pulley abutting part is formed in a tapered shape of the third rod-like supporting means, the second及
And a third rod-shaped supporting means opening / closing member, and an air cylinder for sliding the opening / closing member in the longitudinal direction of the bit.